Magnetic behavior in TmAgSi

Abstract The ternary intermetallic TmAgSi compound which crystallizes in the hexagonal ZrNiAl-type crystal structure. TmAgSi has been investigated by means of magnetic, heat capacity and neutron diffraction measurements. The experimental data revealed the presence of an antiferromagnetic ordering below TN = 3.3 K with the magnetic moments lying within the basal plane. At 1.5 K they are equal to 6.31(6) μ B . The determined magnetic structure is non-collinear and can be described by three different propagation vectors: k ⇒ = [ 1 2 , 0 , 0 ] , k ⇒ ′ = [ − 1 2 , 1 2 , 0 ] and k ⇒ ′ ′ = [ 0 , − 1 2 , 0 ] .